What is the currently favored explanation for the evolution of vertebrate jaws?

Q: What are the hypotheses used to trace early evolution of animals?

A:

Q: Why the enteropneusta are not classified in chordates?

A: Enteropneusta belongs to phylum hemichordates. Few properties of hemichordates: They are…

Q: What is a jawless vertebrate-petromyzon with its structure?

A: Jawless fishes are otherwise known as "Agnatha" and it is a superclass of the phylum Chordata. These…

Q: . When during the history of life did vertebrates evolve?

A: Earliest Vertebrates evolved 550 million years ago.

Q: If you discovered a fossil hominin that was adapted for both arboreal and bipedal locomotion, had an…

A: Introduction Bipedalism is a type of terrestrial locomotion in which an organism moves by using its…

Q: What is the select advantage of the evolution of the jaw in dogfish shark?

A: The dogfish shark or spiny dogfish is the species of the Squalidae family of sharks, which is a part…

Q: According to the fossil record, what did the common ancestors of modern whales and dolphins look…

A: Evolution is the orderly change from one form to another form.

Q: What feature separates the Chondrichthyans (sharks and rays) from the lobed-finned fishes? O some…

A: The class Chondrichthyes has two subclasses: the subclass Elasmobranchii (sharks, beams, skates, and…

Q: What evidence suggests that four-legged animals came from fish?

A: Evolution is a slow process which explains that how the species changes with time to survive in…

Q: Why are the lung fish considered to have a common ancestor with amphibians

A: Rhipidistian freshwater fish belonging to the Dipnoi subclass are lungfish. Lungfish are best…

Q: Urochordates, instead of amphioxus, are now considered the sister group of vertebrates. Why is…

A: Urochordates are monophyletic and belong to Vertebrata. The tadpole larva shows the morphology of…

Q: What is the evolutionary relationship of Neanderthals to Homo sapiens?

A: While a modern human who lived about 40,000 years ago was found to have about 6-9 percent…

Q: Define about Fishes: Evolution of the Jaw ?

A: An aquatic vertebrate that bears gills for respiration and lacks limbs with digits is called fishes.…

Q: What makes hydra, planaria, salamanders, and fish so much better at regenerating than mammals?

A: Answer- Regeneration is the process by which an organism damaged or missing cells of the organisms…

Q: From which diapsid subgroup have crocodilians descended? What other major fossil and living…

A: An organism is any individual entity that embodies the properties of life. Organisms are classified…

Q: What derived characters do sharks and tuna share? Whatfeatures distinguish tuna from sharks?

A: Pieces are true, jawed vertebrates with specific organs for respiration, excretion and blood…

Q: Which group of hadrosaurs had crests?

A: Hardradosaurids means bulky lizards. They were the family of herbivores dinasaurs. They were the…

Q: What are the five classes of vertebrates? To which of these do human beings belong?

A: Vertebrates: These are those organisms that have a spinal cord and it is surrounded by bone or…

Q: According to the latest researches in Physical Anthropology, what is the relationship between…

A: Physical anthropology is also known as biological anthropology. It is a branch which focuses on the…

Q: Hagfishes and lampreys are the only living representatives of a veryancient group. Why do you…

A: Jawless fish belongs to phylum Chordata, subphylum Vertebrata, and class Agnatha. The class includes…

Q: Why are paleontologists excited to find teeth in the fossil record? Name three pieces of information…

A: By researching or studying fossil records we learn how long life has existed on Earth  as well as…

Q: Find the hash mark indicating the origin of jaws. Which group or groups of vertebrates possess jaws?…

A: Vertebrates are the chordates that have a vertebral column.

Q: What might have been some evolutionary pressures acting on animals that led to the internalization…

A: Evolutionary pressure means factors that contribute to evolution which variations will provide the…

Q: What group of animals is thought to have moved onto land to become the first amphibians?

A: Frogs, turtles, toads, skinks, and caecilians are all members of the class of cold-blooded…

Q: In 1928 Walter Garstang hypothesized that tunicates resemble the ancestral stock of the vertebrates.…

A: Introduction: Tunicate dwells in marine environment and is an invertebrate belonging to subphylum…

Q: Discuss the features of the agnathans, vestiges of the first vertebrates, the jawless fishes.

A: Agnatha is a superclass of jawless fish in the phylum Chordata, subphylum Vertebrata, consisting of…

Q: what  is a carapace?

A: Numerous animals have a protective covering on the outside of their bodies. Some of the animals with…

Q: why do prehistoric remains consist of almost inclusively of bones and teeth?

A: It is generally found that the prehistoric times mainly comprise of harder body parts like bones and…

Q: What is the type of digestive system present in beings of the phylum Arthropoda? Are these animals…

A: The phylum Arthropoda is composed of animals with jointed appendages or legs. It is a phylum of…

Q: How and why do jaws have evolved?

A: How jaws evolved : Jaws probably originated in the pharyngeal arches supporting the gills pf jawless…

Q: We usually think of jaws as structure whose original function was biting. What might have been a…

A: The jaw is any opposable articulated structure at the entrance of the mouth, typically used for…

Q: Based on phylogeny and history of evolution, do new anatomical features such as lungs (amphibians)…

A: The study of links between various groups of species and their evolutionary development is known as…

Q: Name two structures found in the gut of shark but not of frog ?

A: Digestion in shark takes place by digesting the food into a semi-liquid chyme.

Q: Given that modern echinoderms and chordates look nothing alike, what factors have led zoologists to…

A: Echinoderms are animals that belong to the phylum Echinodermata. They are recognized by radial…

Q: Name three “unique” characteristics observed in the dogfish shark and explain how these features…

A: There are varieties of species of shark and each has a specific adaptation for survival in a…

Q: Define “diphyodont” and “heterodont” and explain why both terms apply to mammalian dentition.

A: The teeth development and their arrangement in the mouth is called dentition. It involves number and…

Q: Which well-known group is ancestral to all living birds? What evidence in the fossil record supports…

A: Fossils are the prime pieces of evidence of evolution. It includes the remnants or impressions of…

Q: Evolutionarily, the jaws of vertebrates developed from   the circular mouth of lampreys.   the…

A: The evolution of the jaw is one of the foremost noteworthy innovations in vertebrate history. A jaw…

Q: What are the largest animals ever to have lived on Earth? From what animals are they thought to have…

A: The branch of biology that deals with the structure, function and evolution is called zoology. It…

Q: Amphioxus long has been of interest to zoologists searching for a vertebrate ancestor. Explain why…

A: Amphioxus, also called lancelets, are the marine invertebrate chordates.

Q: How do you explain the significance of digestive adaptations for flight in flightless birds?

A: Birds have a strong, but a lightweight framework of bones. This is achieved by the fusion and…

Q: If members of a group, such as chordates , evolved from a common ancestor then they should show…

A: The oldest discovered fossil of chordate is Pikaia gracilens belonging to cephalochordate. It is…

Q: What types of molecular and morphological changes occurred along the different branches that led to…

A: Answer: Introduction: Tetrapods (means four limbs) evolved from a group of animals called as the…

Q: Prestosuchus chiniquensis was a predatory animal from the Triassic Period most closely related to…

A: Prestosuchus is a wiped out ( extinct) family of pseudosuchian in the group Loricata, which…

Q: What are some of the functional and evolutionary advantages of gnathostomes?

A: Gnathostomes are vertebrates that have jaws. Having jaws has an evolutionary advantage for this…

Q: Why was the evolution of jaws selected for? (Choose All That Apply) There's more than one correct…

A: The jaw is basically a structure in the mouth that by the help of a flexible joint have two opposing…

Evolutionary adaptations

Evolutionary adaptation is the process through which organisms adapt or adjust to their surroundings to increase the chances of survival, mating, and reproduction. An organism's behavior, physiology, and structure are adjusted or changed to make it more suited to its environment.